import { type NextRequest, NextResponse } from "next/server";

import { fetchCache, invalidateCache, setCache } from "@/_lib/redis";
import { db } from "@/_lib/db";
import { rooms } from "@/_lib/schema";
import { eq } from "drizzle-orm";
import { createId } from "@paralleldrive/cuid2";
import { publishToChannel } from "@/_lib/ably";
import { EventTypes } from "@/_utils/types";
import { getAuth } from "@clerk/nextjs/server";
import { env } from "env.mjs";

export async function GET(request: Request) {
  const { userId } = getAuth(request as NextRequest);

  const cachedResult =
    env.APP_ENV === "production"
      ? await fetchCache<
          {
            id: string;
            createdAt: Date;
            roomName: string;
          }[]
        >(`kv_roomlist_${userId}`)
      : null;

  if (cachedResult) {
    return NextResponse.json(cachedResult, {
      status: 200,
      statusText: "SUCCESS",
    });
  } else {
    const roomList = await db.query.rooms.findMany({
      where: eq(rooms.userId, userId || ""),
    });

    if (env.APP_ENV === "production")
      await setCache(`kv_roomlist_${userId}`, roomList);

    return NextResponse.json(roomList, {
      status: 200,
      statusText: "SUCCESS",
    });
  }
}

export async function POST(request: Request) {
  const { userId } = getAuth(request as NextRequest);

  const reqBody = (await request.json()) as { name: string };

  const room = await db
    .insert(rooms)
    .values({
      id: `room_${createId()}`,
      created_at: Date.now().toString(),
      userId: userId || "",
      roomName: reqBody.name,
      storyName: "First Story!",
      scale: "0.5,1,2,3,5,8",
      visible: 0,
    })
    .returning();

  const success = room.length > 0;

  if (room) {
    if (env.APP_ENV === "production")
      await invalidateCache(`kv_roomlist_${userId}`);

    await publishToChannel(
      `${userId}`,
      EventTypes.ROOM_LIST_UPDATE,
      JSON.stringify(room)
    );
  }

  if (success) {
    return NextResponse.json(room, {
      status: 200,
      statusText: "SUCCESS",
    });
  }

  return NextResponse.json(
    { error: "Failed to create room!" },
    {
      status: 500,
      statusText: "ERROR",
    }
  );
}